China has called for an emergency meeting of key nations amid tension in Korea over the North's deadly shelling of a Southern island.

It proposed that members of the six nations that have been taking part in talks on North Korean nuclear disarmament should meet in December.

The two Koreas, the US, China, Japan and Russia are involved in the talks.

Correspondents say South Korea's response has been non-committal and that it will consult other countries.

Tension remains high on the peninsula, with the US and South Korea undertaking joint military exercises the North has denounced as a provocation.

Angry protests

The six-party North Korea talks have been stalled since April 2009, and South Korea and the US say they should not resume until the North has made a genuine offer on halting its nuclear programme.

Some analysts think North Korea is trying to raise tensions in order to strengthen its negotiating position and force a resumption of the talks.

Wu Dawei, China's representative to the talks, said on Sunday: "The Chinese side, after careful study, proposes to have emergency consultations among the heads of delegation to the six-party talks in early December in Beijing to exchange views on major issues of concern to the parties at present."

He said this was not a proposal to resume formally the six-nation negotiations.

Mr Wu said "complicated factors" had arisen on the peninsula, adding: "The international community, particularly the members of the six-party talks, is deeply concerned."

The BBC's Chris Hogg in Seoul says the response of South Korea and its allies to China's move has been less than enthusiastic.

A South Korean foreign ministry statement said the proposal would be "reviewed very carefully".

South Korea's Yonhap news agency said President Lee Myung-bak had told visiting senior Chinese foreign policy adviser Dai Bingguo that Seoul was not interested in the early resumption of the six-party nuclear talks themselves, as it was more urgent to deal with Pyongyang's belligerence.

Japan's Deputy Chief Cabinet Secretary Tetsuro Fukuyama said that Tokyo would "deal with the issue cautiously while cooperating with South Korea and the United States".

The Korea crisis began when the North launched a sudden barrage of shells at Yeonpyeong island, close to the maritime border between the two countries, on Tuesday.

Two South Korean civilians and two marines were killed, sparking the resignation of the South's defence minister and angry protests in the South.

Pyongyang insists it was provoked into the shelling by military exercises, which were being carried out by the South close to Yeonpyeong.

'Unpredictable'

The US and South Korea on Sunday began new, pre-arranged military exercises in the Yellow Sea, about 125km (77 miles) south of the disputed maritime border between the two Koreas.

The aircraft carrier the USS George Washington and four other US navy vessels are being joined by South Korean destroyers, patrol vessels, frigates, support ships and anti-submarine aircraft.

Shortly after the exercises began, North Korea again vowed to hit back if its waters were violated.

"We will deliver a brutal military blow on any provocation which violates our territorial waters," the North's state-controlled KCNA news agency said.

Yonhap reported that Pyongyang had placed surface-to-surface missiles on launch pads in the Yellow Sea and had also moved surface-to-air missiles to frontline areas, but the South's defence ministry could not confirm the deployment.

Residents of Yeonpyeong were ordered to shelter in bunkers when artillery fire was heard on Sunday, but the order was lifted 40 minutes later. Only about 20 of the 1,700 residents remain on the island.

The South Korean defence ministry has also now instructed journalists to leave by the end of Sunday as it cannot guarantee their safety.

"At this stage, it is unpredictable what kind of a provocative action North Korea will take using the South Korean-US joint drills as a justification," the ministry said.

Yonhap also reported that South Korean troops on Sunday accidentally fired an artillery round into the Demilitarised Zone (DMZ) that divides the nations. Seoul quickly sent the North a message saying it was an accident, the news agency said.

Earlier, Mr Dai had told President Lee that Beijing would try to prevent the situation deteriorating any further.

Mr Lee had urged China to take what he called a more fair and responsible position on the relationship between the two Koreas.

The chairman of North Korea's parliament, an official known to be a close confidant of North Korean leader Kim Jong-il, has been invited to visit Beijing next week.

LONDON: Pakistani President Asif Ali Zardari was due to hold talks on trade, terrorism and Afghanistan with Prime Minister David Cameron at the British leader's country residence on Friday.

Cameron's Downing Street office said the talks were an opportunity for Britain to pledge its support for "stability, security, democracy and prosperity."

But they're also an opportunity to smooth over a flap about Cameron's critical comments on Pakistan's approach to tackling terrorism.

Last week in India, Cameron accused elements in Pakistan of allowing the "export of terror," suggesting not enough was being done to tackle terror groups inside Pakistan's borders. The comments outraged Pakistani officials and prompted Pakistan's intelligence chief to cancel a planned trip to London.

The pair are also expected to talk about the massive floods which have ravaged northwestern Pakistan. Britain has already donated a total of 10 million pounds (nearly $16 million) to support the relief effort there.

Zardari, the widower of assassinated former prime minister Benazir Bhutto, already met Cameron for informal talks over dinner Thursday evening. He is expected to follow Friday's talks with a speech at a Saturday rally of his Pakistan Peoples Party in Birmingham before departing for Syria.

Accompanying him on this trip is his son, Bilawal Bhutto Zardari — Bhutto's eldest child — who recently finished his history and politics degree studies at Oxford and serves as the party's chairman.

British media had reported that the Birmingham rally would serve as an opportunity for the younger Zardari to launch his political career, but Bilawal released a statement Friday saying that was not true — and that he would be in London soliciting donations for flood victims instead.

The statement also gave a broad outline of the 21-year-old's future plans.

"I intend to continue my education both academic and political," he said. "I am currently looking into the possibilities of studying law. ... I feel that an understanding of law and an appreciation for the rule of law is important for any politician seeking to strengthen democracy in Pakistan."